// -*- C++ -*-
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// Copyright (C) 2005-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file tree_policy/node_metadata_selector.hpp
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* Contains an implementation class for trees.
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*/
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#ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
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#define PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
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#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
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#include <ext/pb_ds/detail/types_traits.hpp>
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namespace __gnu_pbds
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{
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namespace detail
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{
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/**
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* @addtogroup traits Traits
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* @{
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*/
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/// Tree metadata helper.
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template<typename Node_Update, bool _BTp>
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struct tree_metadata_helper;
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/// Specialization, false.
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template<typename Node_Update>
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struct tree_metadata_helper<Node_Update, false>
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{
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typedef typename Node_Update::metadata_type type;
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};
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/// Specialization, true.
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template<typename Node_Update>
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struct tree_metadata_helper<Node_Update, true>
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{
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typedef null_type type;
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};
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/// Tree node metadata dispatch.
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template<typename Key,
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typename Data,
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typename Cmp_Fn,
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template<typename Node_CItr,
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typename Const_Iterator,
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typename Cmp_Fn_,
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typename _Alloc_>
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class Node_Update,
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typename _Alloc>
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struct tree_node_metadata_dispatch
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{
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private:
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typedef dumnode_const_iterator<Key, Data, _Alloc> __it_type;
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typedef Node_Update<__it_type, __it_type, Cmp_Fn, _Alloc> __node_u;
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typedef null_node_update<__it_type, __it_type, Cmp_Fn, _Alloc> __nnode_u;
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enum
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{
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null_update = is_same<__node_u, __nnode_u>::value
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};
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public:
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typedef typename tree_metadata_helper<__node_u, null_update>::type type;
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};
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///@}
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} // namespace detail
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} // namespace __gnu_pbds
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#endif // #ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
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